Detachable choke-piece.



No. 688,227. Patented Dec. 3, |90I.

H.. P. CURY.

o D ETACHABLE CHOKE PIECE.

:Application mm nb. 1s, 1901.)

(im man.)

l UNTED STATES nsf/snr, @reisst RANDOLPH P. oonrgbr sr. Louis, nissounnnssienon' oF'ronTr-nrus vomi-HUNDREDTHS To JULES BAnoN, or Sr. LoUrs, MISSOURI.

nE'TAcHAeLE ci-soxsmiscs.

SPECIFICATION forming part of Letters Patent No. 688,227, dated December 3, T991.

Application filed February 18, '1901. Serial No. 47,784. (lo model-l Y To alt whom it mayconoern;

Be it known thatI, RANDOLPH P. Conv., of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Detachable Choke-Pieces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to a detachable gunchoke; and it consists of the novel construction, combination, and arrangement of parts hereinafter shown, described, and claimed.

The object ofA this invention is to provide a detachable gun-choke having means for quick attachment to a gun, an improved lock wherebyit can be positively retained in position and prevented from being jarred loose by the concussion, and means whereby it can be x tightened if it becomes loose through wear.

Figure 1 is a side elevation of a gun, showing myimproved choke-piece attached thereto. Fig. 2 is a longitudinal section showing the means by which itis retained in position. Fig. 3 is a top view showing the lock. Fig. 4 is a. View of the under side. Fig. 5 is a detail view showing the construction of the lock.

Fig. 6 is an end view of the main gun-barrel. Fig. 7 is a view showing the inner end of the detachable choke-piece and a hook which may be used to'fasten the choke to the gun-barrel.

In the construction of my improved choke an end Isection lis provided, which is adapted to be secured to the end of the gun-barrel as an extension and to serve as a choke to retain the shot close together.k This section may be made of any desired length and is threaded into the ferrule 2, which is adapted to inclose the end of the gun-barrel, and thereby seon the device in position. To the under side of the ferrule 2 is secured a hook 3, the end o f which is bent up against the end of the said ferrule and is adapted toV engage in the notches 4, formed in the under side of thel part 1, to retain it securely in position and prevent it from 'becoming turned or otherwise becoming loose by the concussion occasioned by ring the gun, and if loosened by wear the part 1 can be turned so that the h ook 3 engages in another notch and wear is taken up. A

The end of the barrel of the gn nis provided with external threads 5, which are cui; airway" on several of the sides, as indicatedbye-,and

the arrangement o." which is best-shown in The end of the ier- 5 5 ber and size to the threaded portions 5 on the 6o main gun-barrel,and between the said 7 are sections ot' threads 8.

In applying the choke in position on the end of the main gun barrel the notches 7 are brought infront of the threaded portions 5 of 65 the main gun-barrelandthe threaded portions S of the ferrule are brought over the blank spaces 6, so thatv the ferrule2 maybe placed around the end ofthe main gun-barrel withl out the threads 5 and 8 interfering with each go' other, and after it has been pressed to the proper position it is turned to engage the threaded portion 8 with the threaded portion 5, thereby giving the full strength `of the ontire number of threads to retain the attach- 7 5 ment in position, while at the Sametime it is only necessary to turn the choke a short distance around to secure the engagement ofail the threads with each other. AFor the purpose of better securing it in position and removing 8o it when desired I provide a suitable lever or arm 9, which is pivoted to the under side of the ferrule 2 and normally rests against the gun-barrel, as shown in Fig. 2. When it is desired'to use this arm or lever, it is swung 85 downwardly and brought at right angles to the barrel, when it may be engaged, to turn the choke inthe direction to secure it in positio or release it from the gun-barrel.

Upon the top of the gun-barrel is a small 9o elevated casing 10, adapted to serve as a sight, and inciosed therein is a spring actuated lock-pin 11, provided on its outer end with a suitable head or point 12. The said lock-pin is prevented from becoming required adjustment by means of a suitable guide`pin.13, extending transversely acrossl the casing 10 and projecting through aslot 14, formed in the said pin 11.

Whe the Chokepiee S, in pOsition, the roo end 12 of the pin 1l engages in a notch 15';

formed in the rear end of the ferrule 2. By

turned out of the 95 this arrangement the choke is firmly locked in position and cannot become jarred loose by the concussion, and the ferrule 2, engaging over the gun-barrel and the choke, forms a connectionwhich is strong enough to stand any strain which the gun itself will stand.

16 indicates a notch at the left of the notch 15, in which the end 12 of the lock-pin 1l is engaged previous to turning the choke-piece to engage the threads with each other. This enables the piece to be placed in exactly the required position over the end of the main gun-barrel before being locked and serves as a gage showing when the device is in position to be locked. As shown in Fig. 2, the threads on the main barrel and in the ferrule 2 termi-nate a short distance from'the ends of those pieces, so no injury will happen to them 'when th .y t te r `sted upon any solid substance. For a similar reason the end ol' the ferrule is lsf .avoid of threads.

In 'i ht shown a modication 0f the operz-iiingerni which consists of a hook 17, provid on e d with a projection 18, which is t nipted to engage Within a suitable recess for in the fer-rule il, and thereby provide turning the choke in 'the direction rs fasten it in position or release it .t gnu-barrel. In this instance the dev l? is not attached to the choke-piece, bu. aybe carried in the pocket, thereby forming obstruction Whatever on the gun-barrel beyond what is occasioned by the fcrrnie A det-'ice constructed as described is sirnple, stro and durable. ly removing the choke the gna i f be converted inte a reguadapted to hunting quail When it is attached in ecoines the regular tullfr gun and is adapted for in which it is desired to meut l concentrate the shot.

The improved connection by which the parts are telescepcd together forms a perfectly secure enrollment, positively retaining the parts in position and giving the full strength of all threads, while it is only necessary to turn the fehoke a partial revolution in order to attach it in position. This forms a very quick attachment, and the parts may be secured together Without inconvenience or delay, and their removal is equally quick.

'I claiml. A detachable choke-piece adapted to be connected to a gun-barrel, and a combined sight and lock carried by the gun-barrel for retaining it in position, substantially as specified.

2. A choke-piece consisting of a section adapted to be connected to theV end of the gun-barrel and having the enlarged portion 2 to inolose the gun-barrel, and a combined sight and lock carried by the gun-barrel for holding it in position thereon, substantially as specified.

3. A choke-piece, consisting of a section adapted to be' connected to the gun-barrel and having the enlarged portion 2 provided with internal threads, there being threads formed on the end of the gun-barrel, means whereby said enlarged portion may be passed over the gun barrel without obstruction from the threads, means for engaging the threads of the portion 2 with the threads ofthe gun-barrel, and means for locking the device in position, substantially as herein specified.

4. A choke-piece, consisting of a section adapted to be attached to the end of a gunbarrel there being broken threads on the end of the gun-barrel, a ferrule connected to said section and having internal broken threads adapted to engage with the threads on thc gun-barrel, and means for turning the l'errulo to engage the threads with cach other and a spring-impelled lock carried by the gun-hanl rel for retaining the device in position, substantally as specified.

5. ln a choke-piece, a ferrule for supporting the detachable section and provided with internal threads and longitudinal grooves which break the threads, suitable threads formed on the end of the gun-barrel and which are broken by longitudinal dat surfaces, whereby the ferrule may he passed over the end of the gun-barrel Without obstruction from the threads and engaged therewith by a partial rotation, and means for locking the attachment. in position, substantially as specitied.

ln testimony whereof l affix my signature in presence ot' two witnesses.

RNDGLH P. 'CGRL lfVi-tnesses:

ALFRED A. Ennis, JOHN C. HIGDON.

IOO 

